According to the National Center for Hydro-Meteorological Forecasting, on June 7, the Northern region and from Thanh Hoa to Quang Tri will have hot and intense heat, especially intense in some places with the highest temperature commonly 36 - 38 degrees C, in some places above 39 degrees C such as Lang Observatory (Hanoi) 39.2 degrees C.
On June 8, the Northern Delta region and southern Phu Tho will be hot, with intense heat in some places with the highest temperature commonly 35 - 37 degrees C, in some places above 37 degrees C. The relative lowest humidity is commonly from 55 - 60%. The hot time is from 12 - 16 hours.
Hanoi area on June 8 is hot, with intense heat in some places. From late afternoon and night, the wind turns northeast at level 2 - 3. From late afternoon on June 8 to morning on June 9, Hanoi has moderate rain, heavy rain and thunderstorms, locally very heavy rain; from the night of June 8, the weather turns cool. The lowest temperature in this cold air wave is commonly 23 - 25 degrees C.
Due to the influence of cold air and rain, in the Northeast region and Thanh Hoa, the temperature tomorrow (June 9) will decrease from 5 - 7 degrees Celsius, the highest temperature during the day will be below 31 degrees Celsius. The lowest temperature in this cold air wave in the Northeast region and Thanh Hoa is commonly from 22 - 25 degrees Celsius, the Northern mountainous region has places below 21 degrees Celsius.
Regarding the development of rain due to cold air, from the evening of June 8 to the night of June 9, the Northwest region, the north of Phu Tho and Tuyen Quang will have heavy to very heavy rain and thunderstorms; North Central region will have moderate rain, heavy rain and thunderstorms, locally very heavy rain.
From the evening of June 8th to the morning of June 9th, other parts of the Northern region will have moderate rain, heavy rain and thunderstorms, with locally very heavy rain.
The meteorological agency warns that during thunderstorms, there is a high possibility of tornadoes, lightning, hail and strong gusts of wind.
Rainstorms accompanied by tornadoes, lightning, hail and strong gusts of wind affect agricultural production, causing trees to fall, houses, traffic works, and infrastructure to be damaged. Heavy rain is likely to cause flash floods on small rivers and streams, landslides on slopes, and flooding in low-lying areas.